<div>
                <label>选择语言</label>
                <div>
                    <label class="radio-inline">
                        <input type="radio" name="language" value="1" checked> C (GCC 4.8)
                    </label>
                    <label class="radio-inline">
                        <input type="radio" name="language" value="2"> C++ (G++ 4.3)
                    </label>
                    <label class="radio-inline">
                        <input type="radio" name="language" value="3"> Java (Oracle JDK 1.7)
                    </label>
                </div>
            </div>
            <div id="code-field">
                <label class="problem-label">提交代码</label>
                <textarea id="code-editor"></textarea>
            </div>
            <hr>
            <div id="submit-code">
                <button type="button" class="btn btn-primary" id="submit-code-button">
                    提交代码
                </button>
                <img src="/static/img/loading.gif" id="loading-gif">
            </div>